Sewer-trap.



' No. 766,046. y PATBNTBD MAR. 29,1904.

. Y P. osTERLE.

SEWER TRAP. APPLmATIoN FILED DB0. 16, 190s. N o' MODEL l Il u 1111 l 'lIl.

' E Z. i

UNITED STATES Iatented March 2Q, 1904.

PATENT OFFICE.

EREDRICK osTERLE. or PTTTSBURG, PENNSYLVANIA.

SEWER-TRAP.

SPECIFICATION forming part of Letters Patent No. 756,046, dated March29, 1904.

A Application filed December 16, 1906 Serial No. 185,392. (No model.) i

To all whom it may concern,.-

" Be it known that I, FREDRICK'OSTERLE, a citizen of the United Statesof America, residing at Pittsburg, in the county of Allegheny and Stateof Pennsylvania, have invented certain new and useful Improvements inSewer- Traps, of which the following is a speciication, reference beinglhad therein to the'accompanying drawings.

This invention relates to certain new Yand useful improvements insewer-traps; and the primary object of the invention is to provide meanswhereby water is prevented from backiiow from the main sewer to the lineleading from the main sewer into the building and the water therebyVprevented from backing up into the cellar of buildings. Y

Briefly described, my invention comprises the embodiment of apipe-section in which is mounted and securely fastened a ring or annulusmade water-tight by the placing of an annular gasket between theperiphery of the Vring and the inner wall of the pipe-section,

the cellar of the house or building throughV the drain leadingtherefrom.

In the accompanying drawings I have shown a practical embodiment of myinvention and will describe the same herein in detail without, however,limiting myself to details of construction as shown and described, andin this detail description reference will be had to the accompanyingdrawings, forming a part of this application, and wherein like numeralsof reference will be employed for indicating like parts throughout thedifferent views of the drawings, in which- Figure 1 is a diagrammaticalside elevation showing the adaptation of my invention. Fig. 2 is alongitudinal sectional view of a section of pipe, showing the trap inposition. Fig.

3 is a transverse vertical sectional view thereof, taken on the line 3 3of Fig. 2. Fig. 4 is a like view taken on the line 4 4 of Fig. 2.

To describe the invention fully, reference will be had to Fig. l, inwhich l indicates the main sewer, 2 the sections of pipe forming aconduit leading thereto,and 3 the drain-pipe, leading from a suitablepoint in the building.

To put my invention into practice, I provide in one of thepipe-sections, either in one of the sections of the conduit formed bypipe 2 or in the drain-pipe, if so desired, a iiapvalve or gate. In thepresent illustration I have shown this flap-valve or gate arranged inone of the pipe-sections 2. It comprises a ring or annulus 4 of slightlyless diameter than the bore of the pipe-section and surrounded by aflexible annular gasket 5 to form an air-tight seal between theperiphery of the ring or annulus and the inner wall of the pipesection.This ring is securely fastened in position in the pipe, as by means ofvscrews 6. Hinged to one edge of the ring or annulus 4 is a flap-valveor gate 7, which opens toward the discharge end 8 of the pipe, butcloses against the ring or annulus against back pressure. It will thusbe observed that while this flap-valve or gate opens readily to allowthe water to ilow out toward the main Sewer it closes tightly under theleast back pressure, preventing the water backing into the drainpipe,and consequently preventing the water rising and overflowing into thecellar of the building.

While described in detail herein in one of -its practical forms, it willbe evident that in ring and a Hap -Valve hinged to said ring, throughthe walls of the pipeesection and adapted to open under pressure in onedireothrough said gasket and into the said ring. IO

tion and close under pressure in the opposite In testimony whereof Iafixmy signature in direction. the presence of two witnesses.

2. In combination with apipe-section, aring FREDRICK OSTERLE. arrangedtherein, a flexible washer arranged Witnesses: between said ring andsaid pipe-section, a flap- A. M. WILSON, valve hinged to said ring, andscrews passing E. E. POTTER.

